Load-handling mechanism



LOAD HANDLXNG MECHANISM Filed Aug. 1924 A s sheets-sheet 1 /74 .fr ff ,fJ6 J5 73 7/ 5l; JJ 66 )5 May 5, 1930. F.' TNER 1,757,150

LOAD HANDLING MECHANI SM Filed Aug. 8, 1924 5 sheets-sheet 2 May 6,1930. Y F. sToNER 1,757,150

LOAD HANDLING MECHANISM Filed Aug. 8. 1924 5 Sheets-Sheet 3 |||Ill I IIlllllln. IIH UH llnlllf l...

Patented May 6, 19`3 UNITED- STATES- FRANK-STOER, OF LAKEWOOD, OHIO,ASS:[Ghl'Ol-'k T0 THE BAKER-.BAULING ('JOIVIIIANY,v

, QFFICE QECLEVELAND, oiiio, A CORPORATION or oiiio V LOAD-HANDLINGMEcnANisivr :'Appiicaticnisied August 8, 19M.` serialy No. 730,931. v

1 This inventioiiyrelates. to a load handling mechanism, wherebya loador loads may be readily lraised and lowered, or transported fromone-place to another,'andd ischarged.

One object of the invention is to provide an improved mechanisniofthischaracter-ca-l pable of handling `loadsunder varying conditions. g ai 'f Another object of the invention isV to provideimproved means foradjustablysupporting the boom at varying-positions vertically fconditions without changing the size `of the Y Y boom or lengthening orshortening it `as'the whereby it may beb'perated under varying casemaybe.

A further object ofthe invention is to.' lcor-` y relate or associatetheload lifting means with the boom support in order that Vthe formermay be utilized to elevate or adjust the boom t-o the desired operatingposition. Y y Other objects of the invention will be'apparent to thoseskilled in the art to which'rny invention relates from the followingdescription taken in connection with the accompany-- ing drawings,wherein v i Fig. 1 is a sideelevation ofa truck Vand a load handlingmechanism embodyinginy invention. 1 f Y Fig. 2 is an end'elevation ofthe truck` and Vload handling mechanism (with parts broken away) thelatter being shown'slewed'or swiveled about its pivot toone operativeposition to illustrate its manner of use.`

Fig.A 3 is a fragmentary view, partly in section on theline 3-3 of Fig.1 and'partly in elevation of the truck and load handling' mechanism,`looking at the other end of the truck.

Fig. 4 is a top 1 and 2. l v A y Figg isa section on the line 5-5 ofFig. In the drawings, 1 indicates aframe of any plan of parts shownindesired shape and form, preferably constructed from channel and anglebars suitably connected by rivets or otherwise. In theVV illustratedform of construction the frame 1 comprises' a'niainportion' 1 1 yonwhich the mechanismsfor raising ai'idlo'wering loads and moving the loadcarryingfmemben'to be later referred to, are'supported,kand a platformportion 1b, on which loads may be be :rigidly connected to the'framelaanditmaybe a continuation thereof ordisposed in a plane therebelow, as`shown in the drawincgsgror theplatform portion 1b mayembody or haveincorporated in or associated with it a super-posed platform, which maybe'raised or lowered relative to the'fiaine 1.V Vhere the frameisiconstructed. asY lshown in the drawings, Ii preferably providea'p'air of rel-V atively sinallltrailing wheels Zbelow the platform;portion 1b and a pair of 'relatively large'` wheels 3 below the mainframe .portion 1,

' 4 indicates a inotor,'the shaft'of which is connectedA by a sutiablepowei transmitting inechanism'withthe axles ofthe wheels 3 to drivethein in either direction, such mechanism being 'shown enclosed Vin a:suitable housing member 4 (see Fig.r 2)v rigidly concates a mechanismfaiiyA desired construction interposed betwe'enthe motor l and housingmember larand thefframexflffor 'connect-V ing them*together. Themec'lia'nismfn'iay v1 andthe axle members connected tothe housing member4a; j

Thefouter ends of the auleVv members vareshaped to form suitableknuckles '4b on which the traction wheels Barepivoted for steeringpurposes, the, 'connection between the wheels or the axles therefor andthe power transmitting mechanisrnbeing of .such characteruniversaljoints for example-that the wheels may ybe driven while being steered. 8indicates t-heaxle forthetrailing wheels 2; rIheV opposite ends of. theaxle. 8 are preferably shaped to` provide 'suitable knuckles, which f iserve as pivotal `supportsffor the wheels 2, whereby lthey may beA`steered and thereby nected tothe casingof the motor 4. 5" indi- Ylenable the truckto be turned in areas of relatively small dimensions. 9indicates steering connectionsbetween the Wheels J2 and wheels 3,whereby both pairs of wheels may be simultaneously operated about theirpivots for steering purposes. .The connections 9 ing the platform 11, itmay be swung upward- 1jr-see dotted lines in Fig. lewhen the truck isnot in use. The uprights-llL-maycomprise spaced angle barsrigidly'secured to certain of the longitudinalior transverse sills ofthe frame 1 and extend upwardly toform a support. for a dash l5.. 16indicates a. foot pedal associated with the platform 11, and arrangedtov control the release and application of a vbrake mechanism, indicatedasfan entirety at 17. 4The pedal 16 is preferablymountedon the `rod 12Vso that it may readily swing upwardly with the platform 11 for reasonsa1- ready set forth, Y l v The brake mechanism 17 is arranged to 3obrake the movement ofthe truck or to hold it against movement, itsoperating Velements being so arranged and connected to a suitable springnot shown that the latter normally acts toapply the brake and toswingthe pedal'l upwardly, as shown in Fig. 1. Accordingly,.movement ofthepedal 16 downwardly, will yrelease the brake. As a result of thisarrangement,kthe truck is held against movement in either direction atall times'and can only be movedupon the positive opera- Y tion of thepedal 16. The brakemechanism 1 7is preferably constructed to act ontanelement driven directly by themotor, for example awheelfo'r pulley 181vfixedto the eX- l' tended rearend of the motor shaft.` Y 23 indicates asan entirety a controller for cutting in or closing the circuit Vto themotor 4 to operate it at dierent speeds vand lin oppovto a lever 27. Thelever 27is pivoted on the dashl to swing in vertical lplanes.V 28Vindisite directions, in a well known manner.v The controller is operatedby a shaft 24 carrying an arm 25, which isV connected by a link 26 Catesas an entirety a switch l,mechanism associated with thecontroller 23 andbrake mechanism 17, and automatically controlled bythe latter through arod 28*L to break the circuits to the controlleror tothe motor ywhen thebrake is on andv to close the circuit when the brake is released, thepurpose being to prevent operation of the motor ..4'by meansof thecontroller if thelatter is moved from its oifposition in either`direction whenthe brake isV in its applied position. By preference, theswitch mechanism is interconnectedwith the con,

- a base section 34?, havingcross :barsforming troller by means of alink 28b to prevent closing of the circuit in the event the controllerlever is in or is moved to an con position and attemptismade to releasethe brake. As this mechanism does not form part of the .presentinvention, but is described and claimedinLetters Patent No. 1,710,071grantved to EdwardfI-I. Remde, lfurther description" thereof is thoughto be unnecessary.

29 indicates a post or steering column-rotat ably mountedin-suitablebearings 29, 292, and

connected by an arm .30 and link 31 with the ,K

steering connections.` The upper end of the column 29 has connected toit a hand lever 32.

33"indicates an "axle or pivot member disportion la and extendingupwardly therefrom toform a Vertical shaftfor a frame 34. The lower `endof the shaft A33 A is fittedA into a sleeve35 which in turn maybeflangedat its seated between certainofthe klongitudinal sillsconstituting the main frame portion lL and platform portion- 1", TheIframe l34. comprises' a vsupport for a box'containing a battery or`batteries 36 and pairs (of upright members 437, 38, connected by upperandlower horizon- M35 'opposite=ends as shownjat, 35" andixed or talmembers 39, 39. Theuprights37, 38, are

rigidly secured toV base section 34` in any desired manner.. 39aindicates 'plates disposed n at the joints between,l the horizontalmembers 39' and upright members 38gand serving as aconnectionfor atiebarj39 extending from l the plate 39a to the upper` end ofthe adja-4cent. upright 37 .A 38*l indicates a gusset disposed at the jointbetween each.V upper horizontal member 39 andthe adjacent upright 38, 38indicates a shaft yextending at itsop-A posite ends through openingsformed in the uprights 38,1 1ear their upper ends. They purpose of theshaft will laterappear. To provide sufficient bearings for the shaft, Isecure tothe uprights hollow vbosses 38Xj into which the shaft endsextend,` (see Fig. 1). The pairs ,off upright -members y37, 38,arearranged at points intermediate thefront and rear end of the basesection 34a to provide space for supporting a loadsupporting member,such y as aboom 40, and a motor 41, a power transmitting mechanism 42`and operating rmeans 43,. 44, which 'will later be described. The basesection 34a is formed near its front end and betweenythel'uprightmembers 37, Vwith an opening, which vreceives a bearingcollar 46 to rotatably engage abearing; provided von the shaft 33, the-collar 46"being provided with a ange by means of which itis bolted tothe underside ofthe base section 34a. 47 indicates a geariixed to thecol-lar 46. The

gear 47 preferably fltsand is suitably secured l in an annular recessformed in the lower end ofthe collar 46 `or a ringiixedfthereto.- r Thegeareis' engaged by a' pinioirwhich serves as a suitable-element bymeansof vwhichthe 8o posed in vertical position onlthe mamv frame l sor,

frame-orisupport 34 is rotated in-either direction about the shaft' 33by suitable power means (not shown). The powerfmeans is vpreferablyoperated by :an electric motory which in turn is controlled :by acontrollerr 76a.. The controller is operated in either 'direction by alever Ttb'mounted on the dash 15 and connected to the shaft of thecontroller by connections 76C (see Fig. 2) The motorV may be driven ineither direction and it iny turn through the power means will rotate orslew the frame 34 to either side of thetruck y' frame 1, as desired, asshown in F 2?` Iiitermediate its ends the upright members support abearing box 50, which receives they upper end of the shaft 33and(3o-operates with the collar 46 to form spacedy bearings between theshaft 33 andthe support or frame 34 for the latter to rotate on. ,Theopening for the collar 46 and shaft 33 is preferably arranged near thefront end ofthe .frame 34so`as to be substantially centrally oftheweight of the batteries 36, motor 41 andpower transmitting mechanism42and the boom 40- inner faces of theuprights'` (as shown inV Fig. 1)which are preferably .formed from channel bars for a reason which willvpresently` appear. 511 indicatesangle bars disposed along the outerlongitudinal edges ofthe plates 51, each angle bar being positioned sothat one wall of the bar. may be riveted to the plate, as shown in Fig.5, and its other wall project laterally outwardly, sok that it mayco-operate with the plate 51 and outer flange 37 of the adjacent upright37toforin a guide' 51e, the purpose of which will later v be set forth.51d indicates a 'plurality of cross bars extending between andsecuredaty their opposite ends tothe anglebars 51b and serving to support themand the plate 51 in alignment. 51C indicatespairs of aligned Vopeningsformedin the guides 51-, preferably midway between the angle bar 51" andthe fiange 37 one pair of openings being formed adjacent the lower endsofthe guides and the remaining pairs being arrangedV along the upperportions of the guides, although a larger number may be provided,- ifdesired.

The openings 51C serve to receive a rod 52.y to

which 'reference will later be .made The VVwalls of the openings 51 arepreferably reinforced by plates 52 secured to the inner facesvof theplates 51 in any desired manner.

' The boom 40 preferably comprises a-pair'cf channel'members40a arrangedin spaced relaf tion, `but-slightlyV converging toward their upper ends.Theupper portions of themembers 40il may be curved forwardly anddownwardly. `The channel members are secured togethertinspacedrelationby aplurality of cross-pieces 402.40, 40d` and diagonal pieces40er, `40f. "At a pointl. remote from V`their free ends, rthemember-40ELare provided with-upstanding platesf53,thepurpose ofwhich will latervappear.,V v52X` rindicates as an entirety a `supporting means for theboom 40 and slidably mounted inthe guides 51,c to-beadj'usted Athereinandiixed thei'etoat any desired posil- A d tionV intermediate itsfends,the purpose lbeing to jraisefand lowerpthe 'fulcrum of the boom 4,0`sothat theoperating end. of the.r` latter and-the load engaging membersuspended' Ytherefrom may,` be` adapted for various conditions. withoutkthe necessity ofzjsubstituting Va new yboom [or changing-itslength.Offthe supporting nieans52?,l52*indicates a pair of pIateshaVng ianges5'2bfalong their oppositeirlongitudinal yedges andslidably fitting,

the guides 51C.Vv At their lower ends theplates 5 2a aire providedwithfhollowbosses 52" (preferably formed integrally therewith), whichsupport'the inner ends of tubular bearingniembers 52V.. `The inner endsof the bearingV members 52C are flanged., and fit within annularrecesses formed inthe innery wall of the bosses 52btohold themembers.against 1 movementioutwardly. Theouter ends of the bearing members 529extend-through knuckles 40* provided on the! lower orvinner ends of thechannel bars 40a, so as to form a fulcruin for the boom'40.V As showninFig.V 5, the rod 52 4extends throughone lpair. ofthe openings 51 andtubular bearing members 52C and thereby connects the supporting means 52to the Yguides 51C. By removing the rod 52 and adjusting thesupportingmeans 52) along the `guides 51c to align the tubularbearing members 52Vwith'another pair ofjopenings 51C and their inserting the rod 52therein,the fulcrui'nffor thelower end of the boom will be adjusted to positionitsoperating end at a greater yor lesser height according to theadjustment i-jeferredto.` ,i The opposite' ends of`A he rod 5,2 areprovided with removable de-V vicesg suchgascotter pins, topreventitsend-V wise movement. '-.Theboom is. .swung iip- 'Y Vwai-diy anddownwardly about its fulcrnm by 4any suitable means. butpreferably bymeans ofacable or other iiexible connection 40connected to theoperatingmeans 43.

f. y 55 indicates as an entirety a member for engaging a load, wherebythe'load may be raised.

orV lowered oi' otherwise handled. Theload engaging member may be ofanydesired construction, such as a clam shell bucket or a platform, but forillustrative `purposes I have shown' such member as `Comprising a hookV,depending','from aicasing 56,;w-hich in turnis supportedor suspendedfrom the freeend of f the boom by a cableior other flexible connection57,Y connected with the operating means-44 as will be laterdescribed.

The operating means 43, 44 comprise a pair of drums 58,.:59,:onv whichthe cables 40', 57, respectively, windand unwind, for swinging the boom..40 about/"its pivotal support and for raising jor lowering the loadengaging member 55,` The drums 58,59, arefrotated independently of eachotherin either direction? in the manner to be later set forth, to swingthe boom 40 and raise orlower the; `member 55.` The cable 401may beconnected y vat its inner, end to the drum 58 iny any de- Y siredmanner.:From thevdrum 58 the cable 40 leads'to and around a sheave40xtrotat- Yably supportedion the shaft 38 it then reeves y Ythrough and around-aplurality of sets of sheaves 61, 62, supported in suitable blocks,

respectively, asclearly shownin Fig'. 1,.op.

erativelyy connected with the frame 34 yand Vplates 53. The opposite orouter end of the 'cable is carried down.- and connected or anchoredinany suitable manner. j

fThe cablef57 Vis connectedat itsinner end in anysui-table manner to thedrumV 591v From thedrum59, the cable 57 runs around -a guide sheave69,'supported on and near the upper end of the adjacent upright member37, and then around a sheave 7 0 loosely mounted on the adjacent tubularmember 52. Frein the 4sheave 70 the cable 57'eXtends over a sheave 71,rotatably mounted on'a rod8, which is supported at its opposite endsbythe plates- 53. From the sheave 71the 'cablereeves around a sheave'72supportedinl the free end ofthe boom 40, then around a sheave 73 mountedin the casing 56,1and then" around a sheave (not shown) supported in the:tree

end of the boom 40, theqouter end of the cable being carried down andConnected by a. socket and loop to the'shaft ofthe sheave 73; 102indicates Y as an entirety a casting' Y shaped and constructed toform-'a cradle 102 -tor themotor 41 and a housing-section 102b for l thepower transmittingV mechanism 42 by meansof which either drum :58, 59,may be driven. The casting' 102 isrigidlyconnected to disksk 104, whichare provided with integralextensions to provide feet 106, secured toangles. 107 carried by the upright members 38. The feet 106operatethrough the disks or members 104and therhousing andcradlefcasting 102 -to support the motor 41 andpower transmittingmechanism 42 in lixed relation upon thesuppo-rt 34 and in operativerelationshipto Teach other. The

motor 41 is fixed tothe ycradle 102aby a plnf rality of screws `10 i1081 indicates a housing section shapedto t upon the open lend of thehousing section 1021"V and beY clamped thereto and also toV enclose thepropeller shaft connected lto theshaft 109 of the motor 41. The housingsection 108.`is adapted to support'apair-,of spaced bearings for thepropeller'shattl4 Between the propeller shaft bear-ings, the shafty isprovided with a worm` 110 'whichmeshes With anddrives a ring gearforming Vone ofthe velements of the transmitting mechanism 42.

The vpower transmitting mechanism 42 Vfor the'operating means 43, 44,may be of any desired construction. VIn practice I have -used a wellknown type of differential.mechanism, such as is commonly used tordriving the power i Wheels of automobiles.v Such mechanism may besimilar'in'construction tothe usual difterentialmechanism utilized inthetrucl construction herein illustrated for driving the wheels e fromthe motor 4. the use of ya :dilerential mechanism a single motor may'Vcables is wound thereon-on payed-out to swing the boom or Operate themember 55. Each controlling means preferably comprises sieV a clutchandmagnetically operated elements to release it, adapted to beconnected inseries with the motor 41 in suchinanner under the control ,of a selectoror lever 143that-when the motorisoperated either drum, at the will ofthe operative, is driven; Y Y .A

-To carry outthese operations, I provide (1) the lever 148, pivotallym'ountedfon the dash 1 5 and connected through an arm 144 and link 145with a crank arm 146, which isconnected to the shaft ot acontrollerindi- Y cated as anentirety'at 147'; and aV lever 148,pifvotally'mounted on the dash 15, and Vconnected through an arm 149 anda link 150 with acrank arm 151 which is connected toy the shaft etaswitch device 152. The pur? pose ofthe-controller 147 'is to supplycurrent to the motor 41 to drive it ineither direction,

such Vvoperation being dependent upon the movement ofthe lever V143 toeither side of its neutral position, asshown inFig.l 2. The purposeofthe switchdevice 152 is to 'select or Vconnect in either of themagneticallyfcon- 12d trolle'd elements, dependent upon which one los orthe drums is to be operated, in series with i the motor 41, so that uponthe operation of the controller lever 148, the selected drum will berotated in one direction or the other, according to the direction otmovement'of the lever. 7 l I Y As thepowcr,transmittingmeans 42,holding' and lockingmean's` `and release means, as well as the selectormeans is the invention of EdwardH. Remde, and forms the subject imV Ymatter-Othis co-pendingapplication, Serial` Aconstructimi.

s 7 vmast/,150

the batteriesBG andco-operate with the drum` controlling means hereinreferred'to'; but it will be understood that .the controlling means andthe motor may b'eioperatedin any .other manner. VThe motor 41 may be ofany desired t preferably has associated fwithv it a brakemechanism,indicated as an Ventirety at 153, to stop the rotation of itsi Ashaft and elements driven thereby following .the opening .of themotor circuit. Ofthe` brake mechanism' 153,154 indicatesaabralre tendedbeyondthe-upper end of the motor `casingfor this purpose.l155,155a,indicate s Y v, s, Y Y Y Fromthe foregoing descriptionlitVwill be brake shoes pivoted atlcorresponding `ends upon a shaft 156mounted'in a.v boss Von the adjacent end ofthe motor casing. A Theoppo-l site ends of the shoes are connected to a pair `of levers 157,157a,which are soconnected to each other thatl upon the movement ofvtheV latterY in one direction the levers .will

. operate to clamptheshoe's against-the brake load engaging element )Yata predeter mined position bya mechanism which in#l ivheegl; The lever`157?vr is connected` tozone arm" 158 of a lever-[159, which iismounted-V upon a shaft 1 59a suitably supported by the motor casing. Thearm 158a ofthe lever 159 is connected to one 'end of a spring 160. Y Thespring 160 operates to move theflever '157a vin thatV direction whichappliesthe brake Y jshoes andthus normallykeeps thelatter in,v lbrakingposition. To release the brake shoes, Y vthe lever159 is rocked aboutVthe pivoter vshaft'159a in the'oppositedirection, this operation beingpreferably effected by a 'sole-V noid 161,thecore of which is connectedby alink 162 with the arm 1582 of the lever 159.l

Y is cle-energized and thuspermits the spring 160 to automaticallyactuate the brake shoes to clamp the brakewheel.

As willbe understood v description,` the load is raised andlowered bywinding the rope 57.0n or unwindmg it from t-he drum 59, the boom 40isswung upwardly Y 55" or downwardly by winding the rope LOon-or.

unwinding it from thedrum 58 and the support 34 isswung or rotated aboutthe shaft 33 by the drivingof'the gear 47. The movement of each of theseelements is automatie Acally stopped when moved in either direction(except in the downward movement of the cludes a switch means that opensthe circuit to-the motor that voperates such element.k The switch meansfor stopping the Amove-` froin thefforegoing ments just referredtofmaybe similar in con-A struction, each vbeing preferably. similar inframe 34is "indicated at 163'; the switch means for stopping thelmovement of the'boom 40 isindicated at 165 and is arranged'to'beactuatedbyspacedtappets 167 on a=rod166;"

and the switch means for stopping the rais-V ing of the load engagingmember or element 55fis indicated at 169,`it lbeing actuatedv by a'spring 175 when the weight 174 is' raised by the-casing56 torelie'vepull ofthe cable 170 on the arm 171. i

seen thaty Iihaveprovided a load handling mechanism-` infwhich the load"mayfbevmoved on operatedin any onelofa plurality of directions inarrapid and simplemannen'and ,l

that I am enabled-to Veect the various operatends towardeconomy andsimplicityas well Y' as compactness of the construction.` Y It will alsobeseen that by the provision of the vertical guides 51c and afulcrum orsup,.-V

porting means which adjustably engage Vtherewith, I may bodily raiseVorflowerthe boom 40,' thus enabling ,its free end and thel loadengaging membersuspended vtherefrom necessityY of a'truckvcarryingadiiferent size boom, or'substituting a'ne'wcboom. Y

.Y .positioningfthe sheave 69 at the eX- treme upper end` of the upright37 Vandthe sheave70 on the fulcrum for V.the .boom 40,

I may utilize the operating means 44' and load raisingfandloweringvcable 574 operated lthereby to Vraise and lowerl the boomsupport-AY ingfmeans y 52X3to` adjust it '5to the desired sheaves.v v-Inraising the,v supporting means 52X', Ifirst'engage the hook 55 with oneof the cross members of thevboomllO, next I remove` the" rod .52 andthen I vrotate the drumk 59 yin thef direction towindthe vcable 57thereon, the

fico to be adapted to handling loads under many. diiferent L conditions,thereby avoiding Athe j height, since Ithecable 57 reevesaround these veffect of which-will be to slide tliefsupport'- l ing means 52* in theguides 51", such winding continuing until the supporting-means 52X isadjusted 'to the desired position, in alignment witha pairof openings51,ffollowing which the rod 52 ,isreplaced In moving or adjustingthesupporting means 52xr down-V wardly, I proceed inthe same manner, but

to payoutithe cable 57. Due tothe fact that the boom 40 isffu'l'crumedon theframe- 34 and connected, thereto through the cable.v 4:0',

rotate theLdrum 59 in the opposite VdirectionY l' l are not intended tobel in any' sense limiting.v

` said boom thereon, a flexible member extendswing the boom upwardly.I 1Y To those skilled in the art tol which my inventonrelates manyalterationsin construcvtionand widely diieringlembodiments and'applications of `the invention vwill Asuggest themselveswithoutdeparting rfrom the spirit and scope thereof. The disolosurestand the"description herein are purely illustrativeand What Iclaim is: y l. Inapparatus oftheV -t`o said guide for supporting the lower end of "ingdownwardly from the outerA portion of said boomand lcarrying' an elementarranged to: engage a load or be ai'i'clioi'red-,-.shea-vesp n Y Vv.said plates alongsaid guides.

ai'oundwhicli said vmemberreeves",V `one of. said sheaves beingsupported above the upper limit of adjustment of saidisupport alongsaidV guide Yand theother sheavebeing mounted on said support, yandmechanism for windingup or paying out said.. fleXible`member, whereby aload may beengagedand moved -or,fupon 'anchoring oi' the load engagingfelement, the 1.30

boom support may be adjusted to anotherpositionf n i. 2. In apparatus-ofthe class described,y the :combination of a `frame. a1 guide' onv saidframe, a slide-movably engaging said guida* means for adjustably.connecting said slide to said guidefa boom fulcrumed onxsaid slide,

j a flexible member connected tosaid boomi'orr Y swinging it aboutV itsfulcrum, a flexible meniber Vextending downwardlyffrom the outer portionof said boom andfcarrying` an element arranged torengage aloadorbelanchored,` sheaves around which the vlast-menclass :describechffthe'combination ofa frame7 arvertically 'arranged y guide. a` boom,Va-suppoit adjustably 'secured :the operation of saidfmechanism Willadju'stj said supporting means. I v

.4( Inl apparatus ofthe class described; the

v combination of aft'rame, a supplemental frame rotatably mounted onsaid frame,` a pair of;

supplemental frame, aboom, a pair of plates to which saidboom isfulcrumed slidablj7 engaging vsaidrguidesya device for removably y*connecting said plates to saidk guides, a load engaging member, v meanslfor rotatingsaid supplemental trame,V axsheave cariiediby oneVvertically extending guides mounted-on said 7 saidiload engagingmember, said mechanism including a flexible member running around saidsheaves and connected to said loaden- A gaping member. whereby uponanchoring of said'flexible member', and removal `of said device,operation'of said mechanism will slide' 5. Inappaiatus ot' the classdescribed, the

'combination' of a frame7 a pair Vof' guides fr mounted on*l saidframe,- .a boom5 supportingf.

.means for the -fulcrum 'of said-'boom adjustablyengagingsa1d'guides,a11oad 'engaging member, asheave carried by` said supportingmeans', a s heaye carriedy byl said `frame above Vtheliinitofa'djustment of 'saidiulcrum supporting-means, and mechanism foroperating said load engaging member, said Vmechanism including aiiexible member running around said sheaves and connected to saidload-engaging member, whereby upon anchoring of the outer-portion of saidyflexible member, the operation of said'me'chanismpwill adjust saidsupporting' means.`

. Intestimony whereoil have hereunto-'sub- Y scribed my name.` f'

`.tioned iiexible member-reeves, one oi' said ,Y i Y sheaves beingsupported `above fthe Y upper limit of adjustment 'oi'.said slide alongsaid Vguideand the other sheave lbeing mounted on-A said slide. andadrum for winding up or paying outeachjof said members. Y

' 3.. In apparatus ofthe class described,. the combination ot a frame, asupplemental frame rotatably mounted on said frame, a .-pairfoy j nvertically extending'guides'mounted on said supplemental frame`l aboom;V supportii'igV means for the fulcrumoi said boomv adjustablyvengaging said guides,' load .engaging member', means for rotatingsaidsupplemental frame, a sheave. carried bysaid supporting means, a'sheavegcarried bysaid supplemental frame above the 7liniitofadjustment'- `offsaid fulorum supporting means, and mechanismforoperating said'loadfengaging member, said mechanism including aeXible member running aroundA said Vsheaves and connectedto said loadengaging member, wherebyfu'pon anchoring offsaid lexiblemember,

ifs

Y vFRANK srouiiii.

l'nu

CERTIFICATE OF CORRECTION.

Patent No. 1,757,150. Granted May 6, 1930, to

FRANK STONER.

It is hereby certified that the name o the assignee in the abovenumbered patent was erroneously writtenand printed as "The Baker-RaulingCompany", whereas said name should have been written and printed as "TheBaker-Raulang Company", as shown by the records of assignments in thisoffice; and that the said Letters Patent should be read with thiscorrection therein that the same may conform to the record of the casein the Patent Office.

Signed and sealed this 24th day of June, A.. D. 1930.

M. J. Moore, (Seal) Acting Commissioner of Patents.

